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Svet_ta [14]
3 years ago
12

A coil of 1000 turns encloses an area of 25 cm2 and is in a magnetic field of strength 3e-6 T which is parallel to the loops are

a vector. What is the induced emf if the magnetic field changes to 0 in half a minute?

Physics
1 answer:
Kisachek [45]3 years ago
7 0

Answer:

The induced emf is 2.5×10^-7 V

Explanation:

Please see the attachments below

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46 degrees
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A ship travels with velocity given by 12, with current flowing in the direction given by 11 with respect to some co-ordinate axe
nataly862011 [7]

Answer:

v_x = 11.78 m/s

Explanation:

Velocity of the ship is given as

v = 12 units

the direction of the velocity of the ship is making an angle of 11 degree with the current

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1) along the direction of the current

2) perpendicular to the direction of the current

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3 years ago
A mass weighting 16 lbs stretches a spring 3 inches. The mass is in a medium that exerts a viscous resistance of 20 lbs when the
const2013 [10]

Answer:

The equation for the object's displacement is u(t)=0.583cos11.35t

Explanation:

Given:

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w=\sqrt{\frac{k}{m} } =\sqrt{\frac{5.33*386.4}{16} } =11.35rad/s

The damping force is:

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FD = 20 lb

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Replacing:

c=\frac{F_{D} }{u} =\frac{20}{48} =0.42lbs/in

The critical damping is equal:

c_{c} =\frac{2k}{w} =\frac{2*5.33}{11.35} =0.94lbs/in

Like cc>c the system is undamped

The equilibrium expression is:

u(t)=u(o)coswt+u'(o)sinwt\\u(o)=7=0.583\\u'(o)=0\\u(t)=0.583coswt\\u(t)=0.583cos11.35t

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Aneli [31]

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